21885915360 has 96 divisors (see below), whose sum is σ = 68973623712. Its totient is φ = 5833451520.

The previous prime is 21885915343. The next prime is 21885915391. The reversal of 21885915360 is 6351958812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×21885915360² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1113942 + ... + 1133418.

It is an arithmetic number, because the mean of its divisors is an integer number (718475247).

Almost surely, 2^21885915360 is an apocalyptic number.

21885915360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21885915360 is an abundant number, since it is smaller than the sum of its proper divisors (47087708352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21885915360 is a wasteful number, since it uses less digits than its factorization.

21885915360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21836 (or 21828 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 21885915360 in words is "twenty-one billion, eight hundred eighty-five million, nine hundred fifteen thousand, three hundred sixty".